28623951 has 12 divisors (see below), whose sum is σ = 41441400. Its totient is φ = 19038480.

The previous prime is 28623949. The next prime is 28623979. The reversal of 28623951 is 15932682.

28623951 is a `hidden beast` number, since 28 + 623 + 9 + 5 + 1 = 666.

It is not a de Polignac number, because 28623951 - 2¹ = 28623949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 700 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (3453450).

Almost surely, 2^28623951 is an apocalyptic number.

28623951 is a deficient number, since it is larger than the sum of its proper divisors (12817449).

28623951 is a wasteful number, since it uses less digits than its factorization.

28623951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366 (or 7363 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28623951 is about 5350.1356057580. The cubic root of 28623951 is about 305.8979218661.

The spelling of 28623951 in words is "twenty-eight million, six hundred twenty-three thousand, nine hundred fifty-one".